TTL in Bad Cache

[Drunkard Zhang]

2012/7/27 Yingdi Yu <yuyingdi at gmail.com>:
> Hi,
>
> Is there anyone who knows how long an answer that fails in verification can
> stay in the bad cache of BIND? Thanks!
>
Try max-ncache-ttl option.

>From ARM:
max-ncache-ttl
To reduce network traffic and increase performance, the server stores
negative answers. max-ncache-ttl is used to set a maximum retention
time for these answers in the server in seconds. The default
max-ncache-ttl is 10800 seconds (3 hours). max-ncache-ttl cannot
exceed 7 days and will be silently truncated to 7 days if set to a
greater value.